Bosch PS21 Operating/Safety Instructions Manual page 9

2610051962.qxp_PS21 1/16/19 10:09 AM Page 9
The Bosch model PS21 Cordless Drill/Driver
has a chuck that accepts any 1/4" hex bit. The
low RPM capability of this model is not a
deficiency. On the contrary, low speed means
high torque and high torque is a definite plus for
efficient drilling and driving. The low speed also
provides more control to prevent stripout of the
screw and damage to the work surface.
INSERTING AND REMOVING ACCESSORIES
chuck by pulling on bit after it has been
inserted.
Your tool is equipped with a quick release
chuck. To insert an accessory, simply pull
locking sleeve forward, insert desired accessory
into chuck until the locking sleeve retracts
automatically, locking the bit (Fig. 2).
To remove an accessory, pull locking sleeve
forward and simply remove it from the chuck.
PROTECTION AGAINST DEEP
DISCHARGING
The lithium ion battery is protected against
deep discharging by the "Electronic Cell
Protection (ECP)". When the battery is empty,
the tool is switched off by means of a
protective circuit.
VARIABLE SPEED CONTROLLED
TRIGGER SWITCH
Your tool is equipped with a variable speed
trigger switch. The tool can be turned "ON" or
"OFF" by squeezing or releasing the trigger.
The speed can be adjusted from the minimum
to maximum nameplate RPM by the pressure
you apply to the trigger. Apply more pressure
to increase the speed and release pressure to
decrease speed (Fig. 1).
FORWARD/REVERSING
LEVER & TRIGGER LOCK
to help prevent accidental starts and
accidental discharge.
Your tool is equipped with a forward/
reversing lever and trigger lock located above
the trigger (Fig. 3). This lever was designed
for changing rotation of the bit, and for locking
Assembly
To avoid loss of control,
ensure bit is locked in
Operating Instructions
After tool use, lock
trigger in "OFF" position
FIG. 2
HEX-SHANK
DRILL BIT
SCREWDRIVER
BIT
One inch bits should only be used along
with a bit holder as shown in figure 2.
the trigger in an "OFF" position.
For forward rotation, (with chuck pointed
away from you) move the lever to the far left.
For reverse rotation move the lever to the far
right. To activate trigger lock move lever to
the center off position.
Do not change direction
of rotation until the tool
comes to a complete stop. Shifting during
rotation of the chuck can cause damage to
the tool.
FIG. 3
-9-
LOCKING
SLEEVE
CHUCK
BIT HOLDER